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PCB Layout Guidelines

Figure 2. Power Supply Connectors and Headers

5 PCB Layout Guidelines

This section provides general practical guidelines for PCB layouts that use various power and ground

traces. Designers should note that these are only "rule-of-thumb" recommendations and the actual results

are predicated on the final layout.

5.1 Differential Signals

The two input pins of the LMP860x form a differential pair that must be handled following the rules given

below:

• Keep both signals coupled by routing them closely together and keeping them of equal length.

• Do not allow any other signal in between these two signals of the differential pair.

• Keep all impedances in both traces of the signal equal.

5.2 Power, Ground, and De-Coupling

Keep the power supply de-coupling capacitor close to the power supply pin (V

of the part.)

Make sure all return currents of the signals can flow next to the originating signals.

SNOA545C–April 2009–Revised April 2013 AN-1958 LMP860x SOIC Evaluation Board

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